Honeywell T8400C Support Question
Honeywell T8400C Support Question
Find answers below for this question about Honeywell T8400C.Need a Honeywell T8400C manual? We have 2 online manuals for this item!
Question posted by sutnadi on December 12th, 2013
Why Would Honeywell Thermostat Go Blank
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Related Honeywell T8400C Manual Pages
Owner's Manual - Page 1
M18539
1
69-1490
69-1490
Set
Room
FAN Auto On
SYSTEM Cool Off Heat
M18535
Em Ht Aux Ht
Set
Room
Electronic Thermostat
OWNER'S GUIDE
FAN Auto On
SYSTEM Cool Off Heat Em.Ht.
Owner's Manual - Page 2
The ▲ and ▼ keys make it easy for batteries. Batteries are not required because your new thermostat! Congratulations on the purchase of this thermostat in memory.
69-1490
2 Over 100 years of Honeywell engineering expertise went into the making of your temperature settings are held permanently in an effort to provide you to...
Owner's Manual - Page 3
... homes.
Settings
Setting FAN and SYSTEM Switches
Fan and system settings are controlled by using FAN and SYSTEM switches located on the bottom of the thermostat case.
Owner's Manual - Page 8
...-1490
8 If you like saving energy, but would like your thermostat to automatically change the temperature setting, you choose and your home,... setting during the day. Savings can be conveniently programmed to consider purchasing the Honeywell Chronotherm® Programmable Thermostat.
With this thermostat in the cooling mode by lowering the temperature setting 5°F (3°C) to...
Owner's Manual - Page 10
Temperature setting is too warm or cool.
• Check that the SYSTEM switch on . Heating or cooling does not come on the thermostat is below 50°F (10°C).
Troubleshooting Guide
CAUTION
To avoid possible equipment damage, do not operate cooling when outside temperature is set to Heat ...
Owner's Manual - Page 11
For service, contact your local heating and cooling contractor:
11
69-1490 If you have questions concerning this thermostat, call Honeywell Customer Assistance at 1-800-468-1502, Monday-Friday, 7:00 am-5:30 pm, Central time.
Owner's Manual - Page 12
Honeywell Limited-Honeywell Limitée
1985 Douglas Drive North 35 Dynamic Drive
Golden Valley, MN 55422
Scarborough, Ontario M1V 4Z9
Copyright © 2000 Honeywell
All Rights Reserved
® U.S. Registered Trademark
69-1490 J.H. 9-00
6ww9w-1.h4o9ne0ywell.com/yourhome
12 Automation and Control Solutions
Honeywell International Inc.
Installation Instructions - Page 1
... application.
3. MERCURY NOTICE
If this Product...
1. Disconnect power supply before installation. Registered Trademark Copyright © 2002 Honeywell •
• All Rights Reserved
69- 1480- 1 The T8400C Thermostat is fixed at 3 cph. Read these instructions. Location
Install the thermostat about 5 ft (1.5m) above the floor in the instructions and on the product to follow them...
Installation Instructions - Page 2
...Mounting decorator cover plate and wallplate to Wall
IMPORTANT Level only for wiring the T8400C and T8401C Thermostats. Mounting Decorator Cover Plate and Wallplate to wall.
69-1480-1
2 either...1 2
WALL ANCHORS (2)
Wiring
IMPORTANT Use an 18-gauge maximum wire for appearance. T8400C AND T8401C ELECTRONIC THERMOSTATS
YES NO
NO 5 FEET
[1.5 METERS]
NO
M10308
Fig. 1.
Place the desired ...
Installation Instructions - Page 3
... the heating equipment turns on (on most homes. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
2 IN T8401C INSTALLATIONS, CONNECT C TERMINAL. Wiring connections.
T8400C AND T8401C ELECTRONIC THERMOSTATS
KEEP WIRING IN SHADED AREA
ALTERNATE MOUNTING SCREW HOLE
W
Y G
R C
MOUNTING SCREW HOLE
ALTERNATE MOUNTING SCREW HOLE
WIRING ENTRANCE HOLE
MOUNTING SCREW HOLE
M11023...
Installation Instructions - Page 4
T8400C AND T8401C ELECTRONIC THERMOSTATS
Slide the FAN switch in the bottom left corner of the thermostat to select the desired system setting. Slide the SYSTEM switch... SETTING
DECREASE SETTING
FAN Auto On
SYSTEM Cool Off Heat
3. if cool is off ;
Heat: The thermostat controls the heating system.
To increase the temperature setpoint press the s key. press and hold to 11...
Installation Instructions - Page 5
...stop. Heating equipment should start. Cooling system should run continuously.
2. When using an electric heat thermostat, the fan starts immediately.
3. In cooling, the fan starts and stops with the cooling equipment. T8400C AND T8401C ELECTRONIC THERMOSTATS
10. NOTE: After exiting installer setup mode, change cooling algorithm to manufacturer's recommendations.
1. M14687
4. Press...
Installation Instructions - Page 6
Rev. 2-02
www.honeywell.com/yourhome Automation and Control Solutions
Honeywell
Honeywell Limited-Honeywell Limitée
1985 Douglas Drive North
35 Dynamic Drive
Golden Valley, MN 55422
Scarborough, Ontario
M1V 4Z9
69-1480-1 G.H.
